Get the Full StoryWatch how Conor McGregor secured a boxing megafight against Floyd Mayweather Jr. He has been doubted his entire career, but UFC sensation Conor McGregor has taken the combat sports world by storm and will look to attain immortality against Floyd Mayweather Jr. on August 26.

The 12-round boxing superfight was dismissed and ridiculed for months, but The Notorious played an instrumental role in securing what is now being billed the biggest fight in combat sports history.

Building on the success of the roller coaster MayMac media world tour, BT Sport has released an exclusive documentary, titled Conor McGregor: Doubt Me Now , which takes a look at the Irishman s meteoric rise to stardom.

Narrated by Gareth A Davies, the boxing and MMA journalist invites several prominent figures in the combat sports world including Ricky Hatton and Dan Hardy to give their take on McGregor s chances against The Best Ever.'

McGregor became the first fighter to hold two belts simultaneously in the UFC and will look to make history by handing Mayweather his first ever professional loss

The boxing extravaganza takes place next month, August 26, at the T-Mobile Arena in Las Vegas, Nevada.